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Date: Mon, 20 May 2024 12:47:49 -0700
From: "Vishal Moola (Oracle)" <vishal.moola@...il.com>
To: linux-mm@...ck.org
Cc: akpm@...ux-foundation.org,
muchun.song@...ux.dev,
linux-kernel@...r.kernel.org,
"Vishal Moola (Oracle)" <vishal.moola@...il.com>
Subject: [PATCH] Convert __unmap_hugepage_range() to folios
Replaces 4 calls to compound_head() with one. Also converts
unmap_hugepage_range() and unmap_ref_private() to take in folios.
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@...il.com>
---
include/linux/hugetlb.h | 6 ++---
mm/hugetlb.c | 50 ++++++++++++++++++++---------------------
2 files changed, 28 insertions(+), 28 deletions(-)
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 68244bb3637a..6c7ce8679950 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -137,12 +137,12 @@ struct page *hugetlb_follow_page_mask(struct vm_area_struct *vma,
unsigned long address, unsigned int flags,
unsigned int *page_mask);
void unmap_hugepage_range(struct vm_area_struct *,
- unsigned long, unsigned long, struct page *,
+ unsigned long, unsigned long, struct folio *,
zap_flags_t);
void __unmap_hugepage_range(struct mmu_gather *tlb,
struct vm_area_struct *vma,
unsigned long start, unsigned long end,
- struct page *ref_page, zap_flags_t zap_flags);
+ struct folio *ref_folio, zap_flags_t zap_flags);
void hugetlb_report_meminfo(struct seq_file *);
int hugetlb_report_node_meminfo(char *buf, int len, int nid);
void hugetlb_show_meminfo_node(int nid);
@@ -458,7 +458,7 @@ static inline long hugetlb_change_protection(
static inline void __unmap_hugepage_range(struct mmu_gather *tlb,
struct vm_area_struct *vma, unsigned long start,
- unsigned long end, struct page *ref_page,
+ unsigned long end, struct folio *ref_folio,
zap_flags_t zap_flags)
{
BUG();
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 6be78e7d4f6e..02f40bfa3686 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -5643,14 +5643,14 @@ int move_hugetlb_page_tables(struct vm_area_struct *vma,
void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
unsigned long start, unsigned long end,
- struct page *ref_page, zap_flags_t zap_flags)
+ struct folio *ref_folio, zap_flags_t zap_flags)
{
struct mm_struct *mm = vma->vm_mm;
unsigned long address;
pte_t *ptep;
pte_t pte;
spinlock_t *ptl;
- struct page *page;
+ struct folio *folio;
struct hstate *h = hstate_vma(vma);
unsigned long sz = huge_page_size(h);
bool adjust_reservation = false;
@@ -5663,7 +5663,7 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
/*
* This is a hugetlb vma, all the pte entries should point
- * to huge page.
+ * to huge folio.
*/
tlb_change_page_size(tlb, sz);
tlb_start_vma(tlb, vma);
@@ -5714,19 +5714,19 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
continue;
}
- page = pte_page(pte);
+ folio = page_folio(pte_page(pte));
/*
- * If a reference page is supplied, it is because a specific
- * page is being unmapped, not a range. Ensure the page we
- * are about to unmap is the actual page of interest.
+ * If a reference folio is supplied, it is because a specific
+ * folio is being unmapped, not a range. Ensure the folio we
+ * are about to unmap is the actual folio of interest.
*/
- if (ref_page) {
- if (page != ref_page) {
+ if (ref_folio) {
+ if (folio != ref_folio) {
spin_unlock(ptl);
continue;
}
/*
- * Mark the VMA as having unmapped its page so that
+ * Mark the VMA as having unmapped its folio so that
* future faults in this VMA will fail rather than
* looking like data was lost
*/
@@ -5736,7 +5736,7 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
pte = huge_ptep_get_and_clear(mm, address, ptep);
tlb_remove_huge_tlb_entry(h, tlb, ptep, address);
if (huge_pte_dirty(pte))
- set_page_dirty(page);
+ folio_mark_dirty(folio);
/* Leave a uffd-wp pte marker if needed */
if (huge_pte_uffd_wp(pte) &&
!(zap_flags & ZAP_FLAG_DROP_MARKER))
@@ -5744,17 +5744,17 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
make_pte_marker(PTE_MARKER_UFFD_WP),
sz);
hugetlb_count_sub(pages_per_huge_page(h), mm);
- hugetlb_remove_rmap(page_folio(page));
+ hugetlb_remove_rmap(folio);
/*
- * Restore the reservation for anonymous page, otherwise the
- * backing page could be stolen by someone.
+ * Restore the reservation for anonymous folio, otherwise the
+ * backing folio could be stolen by someone.
* If there we are freeing a surplus, do not set the restore
* reservation bit.
*/
if (!h->surplus_huge_pages && __vma_private_lock(vma) &&
- folio_test_anon(page_folio(page))) {
- folio_set_hugetlb_restore_reserve(page_folio(page));
+ folio_test_anon(folio)) {
+ folio_set_hugetlb_restore_reserve(folio);
/* Reservation to be adjusted after the spin lock */
adjust_reservation = true;
}
@@ -5771,11 +5771,11 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
if (adjust_reservation && vma_needs_reservation(h, vma, address))
vma_add_reservation(h, vma, address);
- tlb_remove_page_size(tlb, page, huge_page_size(h));
+ tlb_remove_page_size(tlb, &folio->page, huge_page_size(h));
/*
- * Bail out after unmapping reference page if supplied
+ * Bail out after unmapping reference folio if supplied
*/
- if (ref_page)
+ if (ref_folio)
break;
}
tlb_end_vma(tlb, vma);
@@ -5837,7 +5837,7 @@ void __hugetlb_zap_end(struct vm_area_struct *vma,
}
void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end, struct page *ref_page,
+ unsigned long end, struct folio *ref_folio,
zap_flags_t zap_flags)
{
struct mmu_notifier_range range;
@@ -5849,7 +5849,7 @@ void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
mmu_notifier_invalidate_range_start(&range);
tlb_gather_mmu(&tlb, vma->vm_mm);
- __unmap_hugepage_range(&tlb, vma, start, end, ref_page, zap_flags);
+ __unmap_hugepage_range(&tlb, vma, start, end, ref_folio, zap_flags);
mmu_notifier_invalidate_range_end(&range);
tlb_finish_mmu(&tlb);
@@ -5862,7 +5862,7 @@ void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
* same region.
*/
static void unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
- struct page *page, unsigned long address)
+ struct folio *folio, unsigned long address)
{
struct hstate *h = hstate_vma(vma);
struct vm_area_struct *iter_vma;
@@ -5898,7 +5898,7 @@ static void unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
continue;
/*
- * Unmap the page from other VMAs without their own reserves.
+ * Unmap the folio from other VMAs without their own reserves.
* They get marked to be SIGKILLed if they fault in these
* areas. This is because a future no-page fault on this VMA
* could insert a zeroed page instead of the data existing
@@ -5906,7 +5906,7 @@ static void unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
*/
if (!is_vma_resv_set(iter_vma, HPAGE_RESV_OWNER))
unmap_hugepage_range(iter_vma, address,
- address + huge_page_size(h), page, 0);
+ address + huge_page_size(h), folio, 0);
}
i_mmap_unlock_write(mapping);
}
@@ -6035,7 +6035,7 @@ static vm_fault_t hugetlb_wp(struct folio *pagecache_folio,
hugetlb_vma_unlock_read(vma);
mutex_unlock(&hugetlb_fault_mutex_table[hash]);
- unmap_ref_private(mm, vma, &old_folio->page,
+ unmap_ref_private(mm, vma, old_folio,
vmf->address);
mutex_lock(&hugetlb_fault_mutex_table[hash]);
--
2.45.0
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